Shop CompX Timberline UM226–UM427 black finish lock cores at EasyKeys.com. These factory-compatible lock cores are precision-keyed for CompX Timberline locking systems, including filing cabinets and storage units, and feature a durable black finish for smooth, reliable operation.

Important: CompX Timberline UM-series lock cores are not interchangeable with Herman Miller UM226 – UM427 lock cores. While the key code range is similar, the internal design and control-key system are different. Always verify your furniture manufacturer before ordering to ensure proper fit and compatibility. Fast shipping and guaranteed Timberline compatibility.